Not sure if this is right forum heading
So wife and I are "gonna" try our hand at weathering some junk cars. Tried Micheal's and Hobby Lobby for chalk. Can buy box of many colors but not individual sticks like black, white, brown, umber dark orange etc. (don't need yellow-green, purple, blues or pastels, etc) There is a Dick Blick but its an two hour round trip drive away, and not sure if they carry individual sticks, or maybe I am just imaging that you can buy individual sticks, like you can little bottles of Testor paints.
Suggestions? For the low cost I can just buy the box and toss the other chalks or give to local school.
What spray do you use to overcoat the weathering when done?